...
Filters the data between the specified low cutoff and high cutoff using a 3rd2nd-order Butterworth.
Individual channels can be set to have different parameters by highlighting them in the "PARAMS" tab, but this won't be reflected in the editor itself. The editor displays the parameters of the most recently selected channel(s).
To obtain the same filter in Matlab, you can use "butter(2, [lowcut highcut]/(samplerate/2))". This is correct despite the fact that Matlab's documentation claims it should produce a 4th-order filter (it uses a different convention).
Known issues
Occasionally, the filter settings will only update for every other channel. If this happens, remove the Bandpass Filter from the signal chain and drag another one back in.
...